Performing Dynamically Injected Tasks on Processes Prone to Crashes and Restarts

• Published in: Distributed Computing pp. 165 - 180
• Main Authors: Georgiou, Chryssis, Kowalski, Dariusz R.
• Format: Book Chapter
• Language: English
• Published: Berlin, Heidelberg Springer Berlin Heidelberg 2011
• Series: Lecture Notes in Computer Science
• Subjects: Competitive analysis; Crashes and restarts; Distributed Algorithms; Dynamic task injection; Performing tasks
• ISBN: 9783642240997; 3642240992
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-642-24100-0_15

To identify the tradeoffs between efficiency and fault-tolerance in dynamic cooperative computing, we initiate the study of a task performing problem under dynamic processes’ crashes/restarts and task injections. The system consists of n message-passing processes which, subject to dynamic crashes and restarts, cooperate in performing independent tasks that are continuously and dynamically injected to the system. The task specifications are not known a priori to the processes. This problem abstracts todays Internet-based computations, such as Grid computing and cloud services, where tasks are generated dynamically and different tasks may be known to different processes. We measure performance in terms of the number of pending tasks, and as such it can be directly compared with the optimum number obtained under the same crash-restart-injection pattern by the best off-line algorithm. We propose several deterministic algorithmic solutions to the considered problem under different information models and correctness criteria, and we argue that their performance is close to the best possible offline solutions.